Mírzá Muhammad `Alí - one of the sons of Bahá'u'lláh, known as Ghusn-i-Akbar, meaning "Greater Branch".[ Because of provisions of the will of `Abdu'l-Bahá Shoghi Effendi labeled Ghusn-i-Akbar as the arch-breaker of the Covenant of Bahá'u'lláh.